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ILLUSTRATION 6-20
EDGE DETECTION – CALIBRATION SCREEN
The darker shaded area of this screen represents the width of the item as detected by the system.
NOTE:
om 5184516-100 Rev. 5
8. If you need to adjust the edge points for the calibration item, select & drag
either of the small square boxes found on the vertical lines in the graph until
they represent the edges of the calibration item as you would like.
9. Select the desired calibration mode: either the French or Millimeters.
10. Change the numerical value for the item's size by highlighting the Size field
and typing in the correct #. The defaults are French mode, size 6.
11. Select the OK button to accept the entries as they appear in the menu.
The calibration value will remain valid until either the patient file is closed, or
you re–calibrate the system. The calibration will remain valid through different
images and different runs of the same patient file. Upon exiting the Stenosis
feature, the system will return to the default calibration value of French, size 6.
The Size field defaults to Fren ch mode, size
6.00 (= 2.00 mm).
The 2 vertical lines represent the edge points of
the item as detected by the system.
The graphical line represents the pixel bright-
ness values for each point along the line as
drawn in step 5 above.
CALIBRATION COMPLETE
6-28
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